Pycord music not playing?

Hello everyone,
It's about a Discord bot I have that uses Pycord. I get this error:

@bot.slash_command(name='play', description="Lasse den Bot deine Musik spielen") async def play(ctx, url: Option(str, "Gebe einen Youtube URL an")): guild_id = str(ctx.guild.id) guild_data = load_guild_data() guild_info = guild_data.get(str(ctx.guild.id), {}) if guild_id in guild_data and guild_info.get("Musik-Commands"): if ctx.voice_client is None: channel = ctx.author.voice.channel await channel.connect() # Es wird PyNaCl Libary gebraucht await ctx.guild.change_voice_state(channel=channel, self_mute=False, self_deaf=True) yt = YouTube(url) audio_stream = yt.streams.filter(only_audio=True).first() audio_stream.download(filename="video.mp3") voice_client = discord.utils.get(bot.voice_clients, guild=ctx.guild) voice_client.play(FFmpegPCMAudio("video.mp3")) await ctx.respond(f"Es wird nun **{yt.title}** abgespielt.") else: await ctx.respond("Der Musik Command ist für diesen Server deaktiviert.")

Here's the code again. I reset my PC and it worked before, but now it doesn't work anymore (I'm currently using Python 3.9.13 for the bot).